A method for preparing a high temperature melt integrity separator, the method comprising spinning a polymer by one or more of a mechanical spinning process and an electro-spinning process to produce fine fibers.

A method for preparing a high temperature melt integrity separator, the method comprising spinning a polymer by one or more of a mechanical spinning process and an electro-spinning process to produce fine fibers.

A method for manufacturing at least one of fibers and yarn from natural fibers includes providing at least one of technical fibers, elementary fibers, meso fibrils, and micro fibrils. Greater than or equal to 80% of the at least one of the technical fibers, the elementary fibers, the meso fibrils, and the micro fibrils are short natural fibers having a length that is less than or equal to 12.7 mm. The method includes creating at least one of a dispersion, a gel, a solution, a paste, and a dough including the at least one of the technical fibers, the elementary fibers, the meso fibrils and the micro fibrils; and spinning filaments of the at least one of fibers and yarn using the at least one of the dispersion, the gel, the solution, the paste, and the dough.

Disclosed is a green and low-energy preparation method for cellulose nanofibers based on cold plasma. The preparation method comprises the following steps: (1) uniformly mixing cellulose with a FeSO.sub.4 solution, so that FeSO.sub.4 is immersed into cellulose, and then performing cold plasma treatment under atmospheric-pressure air to obtain oxidized cellulose, the water in the FeSO.sub.4 solution being subjected to cold plasma treatment; and (2) washing and suction filtering the oxidized cellulose obtained in step (1), and then carrying out mechanical fibrillation treatment to obtain the cellulose nanofibers (CNF). According to the invention, the cold plasma and the FeSO.sub.4 catalyst are compounded to construct a highly oxidizing environment that oxidizes cellulose and obtain CNFs by means of mild mechanical dispersion treatment. The whole process is carried out at normal temperature. The method is simple and mild, and does not require other non-environment-friendly chemicals. Meanwhile, the energy consumption of the nanocrystallization process is significantly reduced, the obtained CNF is uniformly dispersed, and the yield is higher.

Disclosed is a green and low-energy preparation method for cellulose nanofibers based on cold plasma. The preparation method comprises the following steps: (1) uniformly mixing cellulose with a FeSO.sub.4 solution, so that FeSO.sub.4 is immersed into cellulose, and then performing cold plasma treatment under atmospheric-pressure air to obtain oxidized cellulose, the water in the FeSO.sub.4 solution being subjected to cold plasma treatment; and (2) washing and suction filtering the oxidized cellulose obtained in step (1), and then carrying out mechanical fibrillation treatment to obtain the cellulose nanofibers (CNF). According to the invention, the cold plasma and the FeSO.sub.4 catalyst are compounded to construct a highly oxidizing environment that oxidizes cellulose and obtain CNFs by means of mild mechanical dispersion treatment. The whole process is carried out at normal temperature. The method is simple and mild, and does not require other non-environment-friendly chemicals. Meanwhile, the energy consumption of the nanocrystallization process is significantly reduced, the obtained CNF is uniformly dispersed, and the yield is higher.

Methods, spray devices, and kits for the in situ formation of silk fibroin fibers and/or aerosols are disclosed. Rapidly mixing a silk fibroin solution and a beta sheet initiation solution forms a mixed solution, which is rapidly expanded to form the silk fibroin fibers and/or aerosols. The beta sheet initiation solution includes a hygroscopic polymer having a molecular weight of between 7.5 kDa and 15.0 kDa. The rapid mixing and rapid expanding occur within one second of one another. Silk fibroin aerosols are formed when a molecular weight distribution of fragments in the silk fibroin solution is below an aerosol-fiber threshold. Silk fibroin fibers are formed when the molecular weight distribution is below the aerosol-fiber threshold.

Methods, spray devices, and kits for the in situ formation of silk fibroin fibers and/or aerosols are disclosed. Rapidly mixing a silk fibroin solution and a beta sheet initiation solution forms a mixed solution, which is rapidly expanded to form the silk fibroin fibers and/or aerosols. The beta sheet initiation solution includes a hygroscopic polymer having a molecular weight of between 7.5 kDa and 15.0 kDa. The rapid mixing and rapid expanding occur within one second of one another. Silk fibroin aerosols are formed when a molecular weight distribution of fragments in the silk fibroin solution is below an aerosol-fiber threshold. Silk fibroin fibers are formed when the molecular weight distribution is below the aerosol-fiber threshold.